Threshing-machine



(No Model.) i'

G. W. PAPKE.

THRESHING MACHINE.

'wz'neffefx Y UNrTED STATES ATENT OFFICE.

GODFREY W. PAPKE, OF ECHO, MINNESOTA.

THRESHING-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 51'? 3,479, dated December 22, 1896.

Application filed December 16, 1895. Serial No. 572,246. (No model.)

T0 @ZZ whom, it may concern.-

Be it known that I, GODFREY W. PAPKE, a citizen of the United States, residing at Echo, in the State of Minnesota, have invented cer- .tain new and useful Improvements in Threshin g-Machin es and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to threshing-machines of the class in connection with which pneu matic stackers are employed, and has for its object to simplify the construction and improve the operation of the same. i

To these ends my invention comprises the novel devices and combinations ofdevices hereinafter described, and defined in the claims.

The accompanying drawings illustrate the preferred form of my invention, wherein, like letters referring to like parts throughout the several views- Figure l is a View in side elevation, showing a threshing-machine constructed in accordance with my invention, some parts being broken away and others being removed.

Fig. 2 is a plan section taken on the irregular line fr of- Fig. 1. Fig..3 is a front elevation of the parts shown in Fig. l, and Fig. l is a vertical longitudinal section taken through the rear or delivery end of the thresher on the line an? x2 of Fig. 2.

ci indicates the thresher-frame and casing, ce the feed-deck, a2 the cylinder, d3 the cylinder-shaft, a4 the vibrating separating-tables' or rattle-rakes7 a5 the shoe provided with the separating sieves or riddles a6, al the graindelivery or shoe spout, and as ci? am the folding or sectional pneumatic stacker-trunk or delivery-spout, all substantially of the ordinary construction. Certain other parts of the thresher have been omitted fromthe drawings, the same being well known and not being essential to a clear understanding of my invention.

In carrying out my invention the cylindershaft a3. is extended at each end somewhat more than is ordinary andis mounted near its outer ends in bearings an, secured to the sides of the thresher-frame a. On its extreme ends the shaft a3 is provided with pulleys L12 als, to one of which power is applied in the usual way. On the extended ends of this shaft ai?, `one at each end of the cylinder a2, I securea pair of fans b. These fans b are incased by fan-cases b, secured to the frame a and open at their outer sides for the admission of air, as shown at b2.

b3 are air-chutes leading one from each of the fan-cases b' and opening at the opposite sides of the flaring base of the lower section as of the stacker trunk or tube as ai. Each of these chutes Z13 is provided with cut-off valves b4, which are controlled and set when ever desired by means of hand-latches b5, working through the upper wall of the chutes. Just forward of these valves b4 are branch chutes c, which open from the under sides or floors of said chutes b3 and join in a common aring mouthpiece or nozzle c', located in position to deliver a blast onto the separating screens or riddles a6.

al* is a pivoted section of the inclined rear end wall of the thresher-frame a. This pivoted section permits easy access to the sepa rating-sieves o6.

The space immediately below the delivery ends of the air-chutes b3 is formed into a twopronged draft-chute g by a V-shaped divider g', which, as shown, is located centrally on the pivoted rear wall-section al* and provided with a top or check board g2 of the same width as the interior of the separator-casing. The lower or receiving mouth of this divided chute g is in position to receive and draw off the dust and chaff from the separating-screens d6, as will later more fully appear.

The operation is substantially as follows:

Rotation is imparted to the fans b and cylin der d2 by means of a power-driven belt (not shown) applied to the pulley a. Motion is imparted to other parts of the threshing and separating mechanism through a driver, (not shown,) but which maybe driven from the pulley 'C113 on the cylinder-shaft d3. Motion being thus imparted, the ordinary threshing and separating actions will take place. 1 The fans Vbeing thus rotated at a highspeed will of course create a strong forced draft through the chutes b3, which being discharged from the rear ends of said chutes into the base of the stacker tube or trunk as a9 continues the forced draft thro ugh said stacker-trunk as di.

IOO

Under this action, as is obvious, the straw discharged from the tables or racks CL4 into the base of the A stacker-trunk will be forced through and discharged at the upper end of said stacker-trunk. The forced draft through the chutes b3 and stacker-trunk as d causes a suction-draft through the draft-chute g, as indicated by the arrow marked therein on Fig. 4. This forced suction serves, as already indicated, to draw off the dust from the separating-screens CLG. On passing through this suction-chute g the dust Will be taken up and discharged with the straT through the stackertrunk. By means of the cut-olf valves b4 more or less of the forced draft may be cut off from its natural or most direct course through the tubes Z2" and be diverted through the branch chutes c. Thus the blast on the separating-screens a may be varied, as may be found necessary, to give the proper cleaning action on said screens.

It will be seen from the above that the forced blast of air Which is drawn oif from the main air-chute and passed over the separating-screens will, after it has taken up the dust and chaff from the same, be sucked in through the suction-chute gand be reunited with the main draft.

It must be evident that by my novel arrangement of the fans and the air-chutes delivering therefrom in the manner above set forth the construction of the machine is greatly simplified and the operation of the same correspondingly bettered.

It will be understood, of course, thatlvarious alterations of the details of construction might be made Without departing from the spirit of my invention.

What I claim, and desire to secure by Let' ters Patent of the United States, is as follows:

l. In a threshing-machine, equipped With a pneumatic stacker and cooperating fan, the combination therewith of the main air-chute discharging into the base of said stacker trunk or tube, a suction-tube having its receiving end positioned near the separatingscreens and its discharge end openinginto the blast from said main air-chute, whereby the blast of air Which is drawn off from the main air-chute and passed over the separatingscreens, will be again united with the main draft, substantially as described.

Q. In a threshing-machine, equipped with a pneumatic stacker and a pair of cooperating fans, the combination therewith of the pair of main air-chutes discharging into the base of the stacker trunk or chute, the pair of branch tubes leading one from each of said main air-chutes, to the separating-screens, and a divided suction-tube having its receiving end positioned near the separatingscreens and its discharge end opening into the blast from said main air-chute, substantially as described.

3. In a threshing-machine equipped Witha pneumatic stacker, the combination With the threshiiig-cylinder, of the pair of fans ZJ, secured on the cylinder-shaft, the fan-cases b' inclosing said fans, the air-chutes b3 leading from said fan-cases b', the hand-operated valves b4 b5 in said chutes b3, the branch chutes c terminating in nozzle c', and the twobranched suction-passage g g g2, on the inclined rear Wall of the thresher-case, substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

GODFREY W..PAPKE. IVitnesses:

HENRY P. MAYDOLE, S. A. MOORE. 

